Improvement



M. TROMLY.

Gun-Lok.

:Patented 'July L2; 1.859

N. PETERS, PHOTD-LITHQGRAPHER, WASHINGTQN. u C.

Unire STATES PATENT' MICHAEL TROMLY, OF MOUNT VERNON, ILLINOIS.

IMPROVEMENT lN LOCKS FOR FIRE-ARMES.

Specification forming part of Letters Patent No. 241,768, dated .Iulylf2, 1859.

To tZ who/11, it may concern/rl Be it known that I, MICHAEL TROMLY, ofAWIount Vernon, in the county of Jefferson and State of Illinois, haveinvented a new and useful Improvement in Locks for Fire-Arms; and I dohereby declare that the following is a full, clear, and exactdescription of the same, reference being had to theaccompanyingdrawings, making part of this specification.

Figure l is a side elevation of a lock constructed after my improvedplan, the lockplate being represented in section and the hammer athalf-cock. Fig. 2 is asimilar View of the same, with the hammerrepresented at full-cock.

Similar letters in the figures refer to corresponding parts.

This improved lock contains many of the features embraced in the lockpatented by me on the 13th day of October, 1857, and its construction issuch as to make it impossible for the hammer to descend when placed athalfcock without being previously raised to a fullcoek, thereby guardingagainst accidental discharge when in this position, and to enable thetrigger to discharge the hammer with more ease than heretofore.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

rIhe lock-plate A of this improved lock, the hammer B, mainspring O,stirrup D for connecting it to the tumbler E of the hammer, and link Fof the toggle-joint connection arc subtantially similar in construction,arrangement, and operation to the same parts described in my patentbefore mentioned, and need not therefore be further described. The otherlink, G, of the toggle is made somewhat similar to the correspondinglink of my former lock, with this difference that the claw G/ extendsdownward therefrom at a more obtuse angle to the line of culmination ofthe toggle, is rounded at its end, and is formed into a claw-hook, G2,at this part, of an acute-angular shape exactly corresponding withanother hook, I, formed in a reverse position on the front part of thetrigger K in such relation to the claw-hook G`z as to enable the two tobecome connected together when the hammer is at half-cock, asrepresented in Fig. 1. The

upper iiat end of the trigger is extended to the front and the rear, thelatter part being rounded and suspended between rigid lugs on the samepin with and beside the end of the -link F, while the front part, K', isextended 'hammer B the said claw G is moved to the rear, and its roundedend comes. in contact with the corresponding rounded part of the hook Iofthe trigger K, which forces thetrigger on its pin to the rear, thespring L yielding to allow this movement, until the point of the twohooks G2 I meet, when the spring L instantly throws the trigger Kforward to its former position and causes the two hooks to engage orlock with each other, and thus secure the hammer at half-cock, fromwhich position it will be impossible to discharge it without continuingto raise the hammer to fulloock, 11o matter what may be the shock orforce exerted on the hammer, trigger, or other parts of thelock. Uponcontinuing to raise the hammer the toggle is brought above the line ofculmination of the said toggle, the spring M forcing it upward when itreaches that line, and the curved surfae of the claw Gl of the link G isbrought against the lower curved edge of the upper widened end, K, ofthe trigger K, as represented in Fig. 2, the pin p, connecting the twolinks F G, being represented in the said iigureabove the positionnecessary to sustain them in order to make the object they accomplishmore'manifest. By pulling the trigger K, the curved lower edge of itsfront widened part, K, moves over the curved surfaceI of the clawG andgradually forces the toggle below the line of culmination, when ofcoursethe hammer is caused to descend by the force of the mainspring C. The

movement of the curved proj ccting edge of the trigger K over the curvedsurface of the claw G the distance necessary to force the toggle claw Gof the link G and the trigger K, subbelow the line of culmination isgradual, and stantially as described. the power necessary to he exertedon the trig- 2. Videning the upper end of the trigger K ger to dischargethe hammer is not, therefore, so as to form a projection, K', in front,Whose so likelyto affect the nerve oi' the person pulllower curved edgeshall operate on the curved ing the said trigger, and to thus distracthis l surface of the claw G', in the manner and for aim, as in theordinary lock. l the purpose set forth.

\Vl1at I claim as new, and desire to secure MICHAEL TROMLY. by LettersPatent, isi \Vitnesses:

l. The combination of the hooks Gf2 I, or T. SL00 CASY, theirequivalents, respectively formed on the I EDWARD MCATEE.

